Extend mental methods for whole-number calculations, for example to multiply a two-digit number by a one-digit number (e.g. 12 x 9), to multiply by 25 (e.g. 16 x 25), to subtract one near-multiple of 1000 from another

Balancing scales - convert between g and kg
The scale is loaded with between 1 and 4 weights. The user then has to balance the scales, converting between g and kg in the process. There is a great deal of control over the level.

A great starter to explore addition, subtraction / difference and partitioning as well as the relationship between grams and kilog More…rams. Levels include converting whole kg to g (and vice versa), converting fractions of kg (eg 1/4kg = 250g) and weights in kg to 1 and 2 decimal places.

For more measuring resources click here.

For more addition and subtraction resources click here.

Game availability:

Online in HTML5 format
Balancing scales - convert between g and kg ?
Balancing Scales g and kg
Add weights to either pan until they are balanced. Can be used to teach addition, subtraction, partitioning, and mass, as well as developing an understanding of the equals sign.

Choose from grams, whole kilograms or kilograms with either 1 or 2 decimal places.

For more addition and subtraction resources click here.

For more partitioning resources click here.

Game availability:

Online in HTML5 format
Balancing Scales g and kg ?
Balancing Calculations
Find the missing number to balance the calculations. An excellent tool for reinforcing an understanding of the role of the equals sign. Choose one objective, or many. You can choose all the objectives for a single year group (or multiple year groups). You can also choose to balance between different types of calculations (eg subtraction and division)

For more multiplication and division resources click here.

Game availability:

Online in HTML5 format
Balancing Calculations ?
Representing Multiplication - arrays and number lines
Represents multiplication using an array and by jumping on a number line. Great for developing an understanding of multiplication by partitioning.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play and the App Store.

Game availability:

Online in HTML5 format
Representing Multiplication - arrays and number lines ?